The TacSol Trail Lite Picatinny Scope Bases easily mount on your factory Browning Buck Mark pistol and TRAIL-LITE Barrels.This newly updated TRAIL-LITE picatinny-style scope base is now sold as a complete sight system. The rear sight is fully adjustable for windage and elevation, while the front sight can be specific to barrel length. Include 2 fiber optic front sights. FeaturesMounting Hardware IncludedScope Base with Integral Adjustable Rear SightLow Front Sight is for 5.5" BarrelsHigh Front Sight is for 4" Barrels